'''try:
    a = float(input('请输入被除数：'))
    b = float(input('请输入除数: '))
    c = a / b
    print('商为：', c)
except ZeroDivisionError:
    print('除数不能为0！')
except ValueError:
    print('被除数和除数应为数字类型')
    '''

'''fileName = 'birthday.txt'
try:
    file = open(fileName, 'r')
except FileExistsError:
    print(fileName, '文件不存在')
else:
    print(fileName, '文件有', len(file.readlines()), '行')
    file.close()
    '''
'''fileName = 'integer.txt'
try:
    file = open(fileName,'a')
    data = int(input('请输入一个整数：'))
    file.write(str(data))
except Exception as e:
    print(e)
finally:
    print('关闭文件')
    file.close()
    '''杨智能